package demo.DataStrucAndAlgo.Easy_pritice;

import java.util.Scanner;

/**
 * @Auther: hjy(lc))
 * @Date: 2022/10/11-10-11-19:42
 * @Description：demo.DataStrucAndAlgo.Easy_pritice
 */
public class BaiduTest2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        StringBuffer result = new StringBuffer();
        int temp = 0;
        int i = 1;
        while(temp + i <= n ){
            result.append("d");
            temp = temp + i;
            i++;
        }
        while(temp < n){
            if(temp % 2 == 0){
                result.append("r");
            }else{
                result.append("e");
            }
            temp ++;
        }

        System.out.println(result.toString());
    }
}
